Carburetor economizer



Se t. 2 2 I p 19 7 J. M. WILLIAMS, JR

CARBURETOR ECONOMIZER Filed June9, 1925 givwcwdtoz eldwila'amgdi' Patented Sept. 27, 1927.

rUNlTED STATES PATENT OFFICE.

GARBUBETOR ECONOMIZEB.

Application filed June 9,

This invention relates to a carburetor economizer.

The broad object of the invention is to automatically vary the proportion of fuel 6 and air in accordance with the demands of a the engine and variation of the load imposed thereon; also to provide means for obtaining a relatively rich mixture of fuel and air and to that end temporarily suspending the func- H! tioning of the means for automatically varying the proportions of fuel and air.

With the above and other objects in view, the invention consists in the novel construction, combination and arrangement herein fully described, shown and claimed.

In the accompanying drawings. Figure 1 is a diagrammatic sectional view illustrating the invention.

Figure 2 is a section on the line 2-2 of Fi re 1.

igure 3 is'a vertical sectional view showing means for dampening the action of the bellows-shown in Figure 1.

In'the drawings 5 designates the intake or induction pipe of an internal combustion engine and 6 a carburetor having a fuel nozzle 7 which discharges into the intake pipe 5, while 8 designates a throttle valve arranged in the pipe 5 between the nozzle 7 and the engine (not shown).

In carrying out the present invention, I employ a sylphon or bellows 9 which is constantly in communication with the intake pipe 5 through a port-l0, the latter being located between the throttle valve 8 and the engine. The bellows 9 is connected to the stem 11 of a needle valve 12 which is used to increase or decrease the output of the fuel nozzle 7. The valve 12 has a threaded portion 13 which screws through the wall of the intake pipe opposite the nozzle 7 and rotative movement is imparted to the needle valve 12 by means of a linkage member 14 shown in the form of alever arm fastened to a stem ll of the needlevalve and having 1923. Serial No. 844,508.

is imposed on the engine, while the latter is running at a comparatively low sped; As the speed of the engine increasesthe) degree of suction decreases, permitting the bellows 9 to expand. This turns the needle valve 12 in the opposite direction and by partially closing the valve 12, reduces the output of the fuel nozzle, thereby economizing in fuel consumption.

As illustrated in Figure 3, the action of the bellows 9 may be damped or retarded by using in connect-ion therewith, a dash pot 17 containing a piston 18 connected by a coupling rod 19 to the movable end of the bellows 9. This is important in some cases to prevent too quick movement or action of the bellows. In order to quickly obtain a rich mixture, the action of the economizer may be temporarily suspended by moving the cylinder of the dash potaway from the bellows 9. The means for doing this is shown as comprising a stem or arm 20 projecting from the cylinder of the dash .pot and having secured thereto a strut 21 which is secured at its other end to the operating rod 22 of the throttle valve 8, the rod 2 being pivotally connected to the operating arm 23 of said throttle valve. Whenever a rich mixture is required, the throttle 8 is opened by means of the rod 22, which cause. movement of the strut 21 and-the cylinder of the dash pot, which in turn acts on the bellows and temporarily suspends the action thereof. This furnishes a comparatively rich mixture as long as may be required and thereafter vthe economizer mechanism re.- sumes its action and regulates the proportion of fuel and air in-accordance with the demands of the engine as indicated by the degree of suction 1n the intake pipe or passage leading from the carburetor to the engine.

The apparatus herein above described is not intended to regulate the flow of the mixtureto the engine but is intended to vary the proportion of air and fuel in accordance with the load imposed on the engine.

I claim:

In combination with the fuel-regulating 'valve of an internal combustion en e, pot connected with said bellows to damp means controlled. by the vacuum pull 0 the the action thereof, and linkage between said engine for automatically adjusting said dash pot and said throttle valve to render 10 valve to vary the proportion of fuel and air, the bellows inoperative under certain circum- 5 said means comprising a bellows in comstances.

munication with the intake ipe at a point In testimony whereof I afiix my si aturei between the throttle valve an engine, a dash JOHN M. WILLIAME J n. 

